Carbon Dioxide is an acid gas that naturally occurring in gas reservoirs and should be strictly kept at low level to prevent corrosion of pipeline and gas process equipment and crystallization of CO2 during cryogenic process (like liquefaction process), also a measure for reducing the global CO2 emission. Besides, CO2 concentration should meet specified quality standards set by major pipeline transmission and distribution companies.
Challenge of Instrumentation
Natural gas is composed of high level contaminants and various hydrocarbons which affects CO2 measurement. Background gas poses cross-interference that affects measurement accuracy and causes long response time. Gas Chromatograph (GC) and Non-Dispersive Infrared (NDIR) are the main approaches for CO2 measurement in natural gas. GC requires frequent maintenance on columns and cannot achieve continuous real-time monitoring. NDIR can hardly eliminate background interference due to its broad absorption band.
The non-contact laser and sensor of FPI analyzer eliminates the influence from process contaminants, which ensures long life time of the laser source and reduces maintenance frequency. The extreme monochromaticity of laser spectrum ensures no interference with background gas
Wellhead/ Gas feedstock
Purification tower outlet
NOTES: The ranges may vary from gas sources and required quality standards. Alternate gases and ranges may be available or customizable on request.